Πλοήγηση ανά Συγγραφέα "Seferiadis, K."
Αποτελέσματα 1-16 από 16
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Absence of leptin expression and secretion by human luteinized granulosa cells
(2003)Whether leptin is secreted by the human ovary is not known. The available data on leptin gene (ob gene) expression by human granulosa cells are conflicting. The aim of the present study was first to re-examine the expression ... -
Changes in gonadotrophin response to gonadotrophin releasing hormone in normal women following bilateral ovariectomy
(1997)OBJECTIVE Pituitary responsiveness to GnRH varies throughout the normal menstrual cycle, We have investigated whether there are differences in the ovarian mechanisms which regulate gonadotrophin secretion between the ... -
Changes in pituitary response to gonadotropin releasing hormone following bilateral ovariectomy in women treated with follicle-stimulating hormone
(1996)Superovulation induction in women attenuates the pituitary response to gonadotropin-releasing hormone (GnRH). The aim of this study was to assess the duration of the suppressing activity of the ovaries on the pituitary. ... -
Development and application of competitive ELISA assays for rat LH and FSH
(1999)Rat LH (rLH) and FSH (rFSH) were measured by sensitive and specific competition ELISAs. The rat LH ELISA used rLH-I-9 coated plates, an antiserum against rLH and an antibody against rabbit IgG labeled with peroxidase. Using ... -
Effect of gonadotrophin-releasing hormone agonist treatment on growth hormone secretion in women with polycystic ovarian syndrome
(1998)The suppression of the pituitary-gonadal axis by the administration of gonadotrophin-releasing hormone agonists (GnRH-a) is used occasionally as an adjunct therapy with gonadotrophins for ovulation induction in women with ... -
Evidence of differential control of FSH and LH responses to GnRH by ovarian steroids in the luteal phase of the cycle
(2002)BACKGROUND: It is known that during the follicular phase of the cycle, estradiol sensitizes the pituitary to GnRH. The aim of this study was to determine the role of ovarian steroids in the control of GnRH-induced gonadotrophin ... -
Growth hormone response to thyrotrophin releasing hormone in women with polycystic ovarian syndrome
(1999)Recent clinical studies have suggested that women with polycystic ovarian syndrome (PCOS) may have disturbances of growth hormone (GH) kinetics and the GH/insulin-like growth factor (IGF)-I system. The knowledge that in ... -
Leptin concentrations in normal women following bilateral ovariectomy
(1999)To study the relationships between gonadal steroids and leptin, 20 women with normal cycles were investigated during the postoperative period following a laparotomy. Fourteen women underwent bilateral ovariectomy plus total ... -
Leptin concentrations in the follicular phase of spontaneous cycles and cycles superovulated with follicle stimulating hormone
(1998)It has been reported that oestradiol may play a role in the production of leptin from adipocytes, To investigate this relationship further, nine normally ovulating women were studied during two menstrual cycles, i.e. an ... -
Luteinizing hormone response to gonadotrophin-releasing hormone in normal women undergoing ovulation induction with urinary or recombinant follicle stimulating hormone
(1998)Oestradiol enhances pituitary sensitivity to gonadotrophin-releasing hormone (GnRH) in normal women, while in women undergoing ovulation induction the putative factor gonadotrophin surge attenuating factor (GnSAF) attenuates ... -
Oestradiol plus progesterone treatment increases serum leptin concentrations in normal women
(2001)BACKGROUND: Previous studies have alluded to a role for both oestradiol and progesterone in the secretion of leptin from fat cells in the human, although direct evidence has yet to be obtained. The study aim was to assess ... -
Purification of a candidate gonadotrophin surge attenuating factor from human follicular fluid
(1999)Gonadotrophin surge attenuating factor (GnSAF) is a new non-steroidal ovarian substance, different from inhibin, which attenuates the pre-ovulatory luteinizing hormone (LH) surge in superovulated women. Human follicular ... -
The recombinant subdomain IIIB of human serum albumin displays activity of gonadotrophin surge-attenuating factor
(2004)BACKGROUND: Gonadotrophin surge-attenuating factor (GnSAF) is an as yet unidentified ovarian factor that acts on the pituitary to attenuate the pre-ovulatory LH surge. In a previous study, GnSAF bioactivity was proposed ... -
Relation between leptin and cortisol values in umbilical vessels at normal vaginal delivery
(2004)To study the role of various hormones in the control of fetal leptin secretion during labour, 33 pregnant women with normal singleton term pregnancy were recruited. At the time of spontaneous vaginal delivery, a venous ... -
Treatment of normal women with oestradiol plus progesterone prevents the decrease of leptin concentrations induced by ovariectomy
(2000)To study the role of oestradiol and progesterone in the secretion of leptin, 21 normally ovulating women were recruited from those scheduled for ovariectomy plus hysterectomy performed in mid-follicular phase of the cycle. ...